Here's another test you can try. Open the Ador panel and disconnect the battery. Now look at the circuit board which is mounted vertically on the right side of the battery compartment. There is a row of electronic connector pins sticking up along that board. They are numbered 1-6, #1 is furthest...
If it was in "manual mode" it wouldn't open or close ever by itself.
I would first make sure it was quite dark for several hours and see if it closed by that time. You've maybe done this already.
There's another programming option for light sensitivity. It will close earlier and open later. That...